Reamer



' Jan. 6, 1925.

C. CASEY BEAMER Filed Oct. l0, 1921 Fatented dan. 6, 19225.

UNITED STATES CHRISTOPHER CASEY, 0F WYNNV'E, TEXAS.

REAMER.

Application led october 1.0, 1921. Serial No. 506,926.

To all whom t may concern: v

Be it knownthat CHRIs'roiHER CASEY, a citizen of the United States,residing at Wynne, in the county of Chambers and State of Texas, hasinvented certain new and useful Improvements in a Reamer, of which thefollowing is a specification.

This invention relates to new and useful improvements in a reamer.

One object of the invention is to provide a device of the characterdescribed especially designed to ream around a drill bit that may becomestuck in a bore so as to free said bit, and its stemfsothat the same maybe withdrawn. i

Another -object is to provide a reamer equipped either with reamingblades, or reaming cutting rollers, said blades or rolllrs being'detachable, if desired from the ead.

With the above and other objects in view the invention has particularrelation to certain novel features of construction operation andarrangement of parts, an example of which is given in this specificationand A illustrated in the accompanying drawings, wherein Figure l showsthe side view of a bit stuck in a well bore, showing also a verticalsectional view of the reamer in operation, in its relation to the bit.

Figure 2 shows a bottom view of the reamer, partially in section, withone of the blades removed. Y

Figure 3 shows a side view of one of said blades. j

Figure 4 shows a side view of one of the .rolling cutters employed,mounted upon a detachable anchor, and 1 Figure 5 shows an edge view ofsaid anchor, showing the cutter partially in section.

Referring more particularly to the drawings the numeral l designates thedrill stem to the lower end of which the bit 2 is attached in the usualway. Said bit is shownf ving the shank 5 which is internally threaded toreceive the lower end of the stem 4. The head and stem, to which it isattached, are of a size to pass, over the drill stem and drill, and thelower end of the head has either blades or rollers which cut away theformation around said drill stem andbit. These blades or rolling cuttersmay be made detachable if desired so that they may be removed, whenworn'or broken, and replaced with new ones. For this purpose the headhas vertical side grooves 6spaced apart therearound, and dove tailed incross section. The material of the head is thickened at the grooves sothey will not weaken saidI anchors being dove tailed in cross section toiit into said grooves. The lower end of each anchor has an inside undercut notch 9 to receive the adjacent lower edge of the head, which isformed to fit'therein. Each anchor may be secured in `place by means ofa set bolt l0 or other similar securing The llower end of each anchormayl be formed into a cutting blade 11, as shown in'Figures l, 2 and 3or may -be equipped with rotatable cutting rollers. 12, of anyapproveddesign. If the bit is stuck in soft formation the cutting bladeswill beused but if the bit is stuck in rock` or hard formation thecutting rollers will be found prefj erable.

What I. claim is A reamer including a tubular head hav-v ing longvertical side grooves, dovetailed in cross section,'anchors fitted intothe grooves, the lower `ends of the anchors being thickened, saidthickened portions havingarcuate notches which receive the adjacentlower edge of the head, studs carried by the lower ends of said anchors,lcutters mounted on said studs, means for retaining said cuttersthereon, and a tubular stem to whose lower end the head is attached.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. Y

CHRISTOPHER CASEY.

Witnesses.: A

E. V. HARDWAY, W. I-I. DUNLEY.

